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Finding the Fourth Proportional to 1,372, 1,893.29 and 774.50

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Solution

The fourth proportional to 1,372, 1,893.29 and 774.50 is: 1,068.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372 : 1,893.29 = 774.50 : x
  2. Step 2: Convert to fraction form
    1,372/1,893.29 = 774.50/x
  3. Step 3: Cross multiply
    1,372x = 1,893.29 × 774.50
  4. Step 4: Simplify right side
    1,372x = 1,466,353.11
  5. Step 5: Solve for x
    x = 1,466,353.11/1,372
  6. Step 6: Final answer
    x = 1,068.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.